I made this launcher to help my phone's battery from draining and also consume little to no space in memory. Using this app is simple, just make as many as categories as you want and for each category assign up to six apps to quick launch them anytime you want.

Instructions:

Use the home button of your device and select Dark Dimension Launcher.

Touch the "General" category and you will see system commands like adding new categories.

While touching, slide your finger to the "Add Category" button and release to execute.

Touch the "General" category again and slide your finger to "Edit Categories" and release
.
Now you are on "Edit mode" where you can select any category you added and assign an app from your device to it.

Once finished execute "Edit Categories" again to stop editing.

Now you can quick launch any app you have assigned on edit mode anytime you want!

Screenshots: